Intel Xeon E7 4820 v3 's Advantages
Released 5 years and 3 months late
Higher specification of memory (1866 vs 1333)
Newer PCIe version (3 vs 2)
Higher base frequency (1.9GHz vs 1.866GHz)
Larger L3 cache size (25MB vs 12MB)
More modern manufacturing process (22nm vs 45nm)
Xeon E7530 's Advantages
Lower TDP (105W vs 115W)